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  <h1 class="title">简介</h1>
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   These functions let you read and manipulate ID3 tags.
   ID3 tags are used in MP3 files to store title of the song, as well
   as information about the artist, album, genre, year and track
   number.
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   Since version 0.2 it is also possible to extract text frames from
   ID3 v2.2+ tags.
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